Description of the Flag

Johnson County is a county located in northeast Kansas, in the central United States of America. The county's population - the fastest growing in the state of Kansas - was 451,086 at the 2000 census, and it was estimated to be 516,731 in
the year 2006, making it the largest in the state. Its county seat is Olathe, and its most populous city is Overland Park. Most of the county is suburban, being a part of the Kansas City Metropolitan Area.

History

Johnson County is named for Rev. Thomas Johnson, and was one of the first counties established in the Kansas Territory in 1855. The Oregon-California and Santa Fe Trails, which originated in nearby Independence, Missouri, passed through the county. The renowned gunfighter Wild Bill Hickok settled for a time in the county, becoming constable of Monticello Township in 1858. The county was largely rural until the early 20th Century, when communities such as Overland Park and Mission Hills were developed as suburbs of Kansas City, Missouri. Suburban development boomed after World War II." - from Wikipedia
A photo of the flag can be seen in Waymarking website. Valentin Poposki, 15 January 2008